Please need fast answers for these multiple choices don't provide each section explain just answers is enough

16 Which of the following goods BEST fits the characteristics of a private good? (4.03) an ice-cream cone fire protection a professor giving a lecture in a large classroom disease prevention D 17 Consider an economy with just two citizens. If Sanjay's marginal benefit from mosquito control is $10 and Anjuli's marginal benefit is $25, then the optimal level of a public good like mosquito control occurs when the marginal cost of mosquito control is: (4.00) . $35.00 $10.00 $25.00 $17.50 OD 18 A coal-powered electrical generator that discharges smoke into the air and causes uncompensated costs and discomfort to residents of a town has a(n): (4.04) external cost quasi-public good C specific tax external benefit B D 19 Which of the following is a common resource? (4.03) A fish, forests, and a dorm kitchen B. forests C a dorm kitchen fish B B OD 20 Whenever human activity generates a concentration of a substance in the environment sufficient to cause harm to living things, it is called: (4.03) A pollution an external shock a free good a result of human greed B c